With soaring earnings and sales growth, megacap Toyota could be one of the big turnaround stories of the year. But to fully grasp its potential, you have to dig into Japan's politics. Toyota (TM) has risen modestly from its 83.83 buy point from a base. This was a first-stage breakout after a years-long sideways trend. As you'd expect, foreign sales are Toyota's lifeblood, accounting for 74% of unit sales in the April-September half. So you can